DxD: Building A Demon Clan From Scratch. - Chapter 28: Slash

In a future timeline, the earth was visited by a species known as the Slarkovs.
Having lost their home planet and in search of a new one, earth was the next habitable planet for them.

Humans and Slarkovs made a deal with each other in return for the Slarkovs living on earth.
The Slarkovs traded their technology and knowledge for a new home.
They were similar to humans except for some of them who had slight differences so fitting into the society wasn't a problem.
Over the years Slarkovs and humans began to mate with one another and reproduce offsprings.
This in turn created a new species known as the mixed-blood.
Centuries later mixedbloods could tap into their bloodline and perform unimaginable feats.

Gustav born into an age where bloodline determines everything, struggles to fit with a useless bloodline.
His bloodline only grants him the ability to change his hair color, destroying his hopes and dreams for a great future.
His fate is turned around when an unexpected situation leads to him finding a system that grants him the power to unlock and upgrade bloodlines by completing quests but he's baffled by two quests with a five-year deadline. Success will grant him unimaginable rewards...
But only one thing awaits him if he fails... Death!

Follow Gustav on his interesting journey filled with unprecedented adventures, danger and death, maybe?

On a random day, at a random place… I died.And by the grace of gods, got reincarnated in a world that has put a label over my head of Otaku.'Rise of the Thunder Emperor. 'Same clichè dense hero and harem of beauties involved in an Academy setting.I would have accepted my fate if I had gotten in some mob's body but no…I had to be a villain who was destined to taste the awakened power of the protagonist, firsthand.I planned to manage my life through this whole mess and if possible get that milf teacher on the way too.But why the heck this hero is behaving like he knows what I am going to do?Why are these heroines not performing their roles and turning yandere for me but not the protagonist?And the milf I tried to trap is now flirting in the middle of the whole school?Why did things turn out so hectic?___________…A/N: - Give the story at least ten chapters before you guys judge.

Those people killed her grandmother, murdered her younger brother, trampled the people she deeply cared about, and even took her own life.

It was because she trusted her ambitious stepmother and half-sister;

because she mistakenly believed that womanly virtue is to have no talent;

because of her noble status and origin….This is what caused her death.

Buried in river water, Ouyang Nuan, gritted her teeth and spoke, “I, Ouyang Nuan was wronged in death. Even if it takes forever, I will become a devil, and in the next life, will not let you off!”

When she once again opened her eyes, Ouyang Nuan was sent back in time to when she was twelve years old. Around this age, her forehead was scarred, her brother fell into the water, and in three years she will be married…

In this life, she will try to change everything to guard and protect those she cares for from those with treacherous intentions. She will live a glorious life!

- Description from Novelupdates

At her cousin's birthday party, she was schemed to have a relationship with her cousin's fiancé, becoming the most shameless woman among rich families, and therefore married to that man, the most influential big shot in the city.After marriage, the wholehearted love only brings endless humiliation and disgust.Later, her cousin returned. He threw out the divorce agreement, saying, “Give Mrs. Leng's position back to her.” He even took their child and gave it to her cousion who was unable to bear children.She finally became disheartened and fled far away with their child, completely disappearing from his world.On his wedding day, he suddenly learned the truth and realized that his white moonlight had always been her, not her cousin.“If love is an isolated island, I'm willing to settle there for you forever.”